We are often taught to be careful with what we say. It might be hurtful to others (ona’at dvarim), it might make us look foolish (chilul Hashem), or it might not exactly be true (sheker), so think twice before talking. On top of the social reasons to be careful with what we say, the Torah tells us about shvuah, or an oath, and says that if a person swears that they did or did not do something or swears that they will do or will not do something, the Torah says that we must keep our word or we will have violated one of the mitzvot. So, when we see this week’s parsha (Torah portion) has yet another commandment called “Don’t break your word on a vow” (“Lo yachel dvaro”), it sounds like we have yet another mitzvah telling us the same thing. Be careful with what you say. Why does the Torah repeat itself?